OK, I went out to the store yesterday and switched tanks on my way there. As I turned in my truck just died with no warning. Tried to restart (normally it fires right up if it stalls) and it just sat there and cranked... Was getting pissed and started looking to see it power wire fell off of the HEI. Everything looked normal. I got the bright idea to switch the tanks. With in 2 seconds of cranking if fired right up /forums/images/graemlins/angryfire.gif. When I hit the switch, I hear a small "groan", so I dont think the switch is bad. Could the "valve" be bad????